@article{,
    author = {Kögl, Matthias; Glahn, Jake; Zigan, Lars },
    title = {A novel laser-induced fluorescence concept for thermometry measurements in machining lubricoolants},
    editor = {},
    booktitle = {},
    series = {},
    journal = {Measurement Science and Technology},
    address = {},
    publisher = {},
    edition = {},
    year = {2024},
    isbn = {},
    volume = {35},
    number =  {5},
    pages = {055210},
    url = {https://iopscience.iop.org/article/10.1088/1361-6501/ad28ea},
    doi = {10.1088/1361-6501/ad28ea},
    keywords = {Fluorescence ; lubricants ; coolant ; laser ; thermometry ; Machining},
    abstract = {This study investigates a two-colour laser-induced fluorescence (LIF) technique for
thermometry in cooling lubricants (CL) for machining. The diagnostic technique should enable
a simultaneous determination of cooling film thickness and film temperature, which is relevant
for typical machining processes like turning and milling processes. The temperature
determination is based on a temperature-sensitive fluorescence intensity ratio of a special dye
determined in suitable spectral regions representing common band pass filters. For this purpose,
two CL emulsions CL6 (6 vol.% CL, 94 vol.% water; normal machining) and CL10 (10 vol.%
CL, 90 vol.% water; heavy machining) and its individual components were doped with the
fluorescence dye Eosin-Y. Temperature dependent spectral LIF intensities were recorded in the
range of 273–313 K, which are relevant for milling and cutting operations. Furthermore,
absorption spectra were analysed as well. The temperature-dependent fluorescence
measurements revealed a temperature limit for the emulsion stability. The emission peaks of
Eosin-Y are shifted with increasing temperature towards longer wavelengths. The sensitivities
of CL10 (1.88%/K) and CL6 (1.58%/K) are comparable to or even higher than the sensitivities
of other LIF dyes provided in the literature. The literature-based dyes were however not
determined in those CL. The measurements showed, that the investigated tracer-CL/water
emulsions mixed with the dye enable a reliable temperature determination.},
    note = {},
    institution = {Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik, LRT 10 - Institut für Thermodynamik, Professur: Zigan, Lars},
    
    
}